CST Adventure CM-A4II 140/70R18 67H TL

The CST Adventure CM-A4II 140/70R18 67H TL is purpose-built for riders who demand traction, control, and confidence across every mile of their journey. With its tubeless radial construction and a rear tire size designed for a wide range of adventure bikes, this tire is ready to tackle pavement, gravel, and dirt with steady, predictable handling.

Designed for real-world riding, the CM-A4II blends on-road stability with off-road capability. Its balanced tread profile provides a solid, highway-friendly center for confident straight-line stability, while the shoulder blocks spring into action on loose surfaces, giving you grip when you need it most. Whether you’re cruising canyon switchbacks or navigating muddy forest tracks, this rear tire maintains a composed, communicative feel through corners and over uneven terrain.

Why riders choose the CM-A4II

• 
  Hybrid tread for all-terrain performance: A thoughtfully balanced pattern that prioritizes highway confidence while delivering off-road bite when the surface changes.
• 
  Wet and loose-surface capability: Optimized grooves and block layout channel water and shed mud, helping you maintain traction in rain or damp dirt.
• 
  Durable tubeless radial construction: TL design simplifies mounting and repair in remote locations and provides reliable performance under load.
• 
  Consistent feel and wear: Engineered for predictable feedback from first mile to last, so you can judge grip and lean with clarity as the tire wears.
• 
  Versatile for modern adventure bikes: Specifically suited to bikes with an 18-inch rear wheel, making it a great single-tuel solution for mixed-surface riding.

Performance in action

On asphalt, you’ll notice steady straight-line stability and confident cornering thanks to the tire’s center rib and tuned contact patch. Off-road, the CM-A4II’s shoulder blocks offer bite on gravel and dirt, helping you maintain throttle control without abrupt slips. In wet conditions or damp clay, the groove geometry helps evacuate water and maintain grip, so you aren’t surprised by slick patches mid-ride.

Specs at a glance

• Size: 140/70R18
• Construction: Tubeless (TL) radial
• Load index / Speed rating: 67H

Ideal for

If your adventures span long highway sections, forest gravel, and light technical trails, the CST Adventure CM-A4II 140/70R18 67H TL is designed to keep pace. It suits riders who want a single, capable rear tire that not only handles daily commutes and weekend rides but also expands their backcountry horizons without swapping to multiple tires.

Practical tips for optimal use

• Keep tire pressure aligned with your motorcycle’s recommended settings to maximize grip and even wear across varied terrain.
• Regularly inspect tread depth and sidewalls for wear or damage; replace when grip indicators fade or there are detectable cuts or punctures.
• Pair the CM-A4II with a well-matched front tire for balanced handling across mixed surfaces and weather conditions.